function s1_hello(){
echo "hello,world!"
}
s1_hello
function s2_tell_who_i_am(){
echo "Enter you name:"
read user_name
echo "user name is $user_name"
}
s2_tell_who_i_am
function s3_which_distro_do_i_use(){
NAME="Beta Linux"
echo $NAME
}
s3_which_distro_do_i_use
function s4_view_my_cpu_arch(){
uname -m
}
s4_view_my_cpu_arch
function s5_show_first_scsi_disk_size(){
lsblk -1 | \grep disk | \grep '^sda ' | awk '{print $4}'
}
s5_show_first_scsi_disk_size
function s6_show_main_memory_size_in_megabytes(){
free -m |grep "Mem:" | awk '{print $2}'
}
